Peyton Manning and Joe Flacco’s images are shown on screens outside Sports Authority Field at Mile High on Aug. 27, 2013. (credit: CBS)

DENVER (AP/CBS4) — Joe Flacco looms larger than life in Denver, and not just because he engineered the stunning upset of the Broncos in the playoffs that propelled the Baltimore Ravens to the Super Bowl title.

The league’s marketing campaign for next week’s kickoff game features several large banners of Flacco fluttering from lamp posts on downtown streets — and a giant one several stories high that hangs at Sports Authority Field alongside a banner of Broncos quarterback Peyton Manning.

That has drawn an angry public reaction from Broncos fans who have taken to Twitter and to the streets to vent their frustration. CBS4’s Vic Lombardi used a Sharpie to draw a mustache on a Flacco poster hanging along Denver’s 16th Street Mall, and covered another with tape.

Some fans have organized an online petition asking the league, which purchased the advertising space from the Downtown Denver Partnership, to remove the Flacco banners.

The Ravens visit Denver on Thursday for the NFL’s regular-season opener. They’re the first champion to open on the road since the Super Bowl team began hosting the league’s Thursday night kickoff celebration 10 years ago.

In a radio interview this week, Manning questioned the placement of the Flacco banner on the stadium, telling KOA 850 AM, the Broncos’ radio affiliate in Denver, “It doesn’t seem to make much sense that the Denver Broncos have to have an opposing player on their stadium.”

“We respect the fans’ passion and enthusiasm for the game,” said Brian McCarthy, NFL vice president of corporate communications. “This will be in many ways a Super Bowl-like atmosphere with a national audience to kick off the season. It’s a tremendous matchup, but built around it is some of our activities that you would see at a Super Bowl or you’d see at an international game where you promote both teams.”

McCarthy noted that in the 2007 kickoff, there were giant banners of Saints running back Reggie Bush hanging alongside those of Manning, then with the Colts, in Indianapolis. Last year, there were subway lines named for Dallas QB Tony Romo and Giants QB Eli Manning. And the year before that, a huge banner of Saints QB Drew Brees hung alongside one of Green Bay’s Aaron Rodgers at an arena near Lambeau Field.

The difference is, this is the first time the giant banner of a player is hanging on the opposing team’s stadium.

McCarthy reiterated that the league wanted the defending Super Bowl champions to open at home, as is custom, but the Baltimore Orioles wouldn’t reschedule their game, so the Ravens are opening on the road.

He said the game in Denver also is used “to promote the matchups of all the other teams. So, think of it almost as an opening ceremony. During the game next Thursday we will celebrate the return of the NFL across the country. There will be special moments before the game that will be different than if this was a Week 7 game, which it could have been.”

McCarthy added that images of Manning will be displayed in Baltimore when the signage and stage for Keith Urban’s kickoff concert there go up next week.

Defensive end Derek Wolfe said he prefers everyone leave the banners alone and let the Broncos’ defense worry about taking down Flacco.

“We’ll take care of that,” he said. “You guys just come to the game.”

Here were the reactions from two different CBS4 newscasters on Monday night:

Vic Lombardi: Why is the NFL decorating our mall? This isn’t our color scheme. We don’t need Joe Flacco reminding us that there’s a football game next week. It’s almost an insult … it is an insult! Is the NFL not aware of the pain this man and this team inflicted on this city? The scab has not healed. This wound is still fresh!

Critic at Large Greg Moody: As if the NFL isn’t setting enough rules already with new bag policies and such, now the league is requiring the banners to be hung around the city. It adds insult to injury — like pouring salt into the wound of last year’s playoff loss.